Cake Toppers

I've seen many cakes with numbers or letters on some sort of stick on top of a cake- like spelling someones name. How do you do that? Sometimes it looks like gumpaste cut outs on wire of some sort but what wire would work and where would you get that?

I've used both floral wire (the straight, not coiled kind) or lollipop sticks. Use a drinking straw so that the wire is not stuck directly into the cake as it's not food safe. The drinking straw helps support the stand-up piece so the weight won't tear through your cake also!